An academic paper [PDF] published in 2018 identified a code snippet Lundblad posted on the site as the most copied Java code taken from StackOverflow and then re-used in open source projects.

Now, Microsoft has partnered with HackerRank to bring code snippets right into its Bing search results pages — and as an added twist, you can also edit and execute this code right on those pages ...

And More There are plenty more code snippet packages to download for JavaScript, as the Visual Studio Marketplace lists 105 such offerings (just searching for "JavaScript") in the Snippets category ...